have a survival meter so if a player without fur clothes goes in a snow biome it ticks down like the air meter, and when it hits 0 they take damage from the cold - and also if theyre still wearing said fur clothes in a desert biome they take damage from heat exhaustion

bring on the power armor.....auto protection from all weather....go temperature regulation

That's actually pretty smart. It could be colored with dyes and have lower protection value than, say, gold or leather armors, and even be unenchantable if the devs wanted it to be used just for clothing. There's a lot you can do with that.